Datasheet

AD7641
Rev. 0 | Page 4 of 28
Parameter Conditions Min Typ Max Unit
Turn-On Settling Time C
REF
= 10 μF 5 ms
REFBUFIN Output Voltage REFBUFIN @ 25°C 1.19 V
REFBUFIN Output Resistance 6.33 kΩ
EXTERNAL REFERENCE PDREF = PDBUF = high
Voltage Range REF 1.8 2.048 AVDD + 0.1 V
Current Drain 2 MSPS throughput 180 μA
REFERENCE BUFFER PDREF = high, PDBUF = low
REFBUFIN Input Voltage Range REF = 2.048 V typ 1.05 1.2 1.30 V
REFBUFIN Input Current REFBUFIN = 1.2 V 1 nA
TEMPERATURE PIN
Voltage Output @ 25°C 278 mV
Temperature Sensitivity 1 mV/°C
Output Resistance 4.7 kΩ
DIGITAL INPUTS
Logic Levels
V
IL
−0.3 +0.6 V
V
IH
1.7 5.25 V
I
IL
−1 +1 μA
I
IH
−1 +1 μA
DIGITAL OUTPUTS
Data Format
7
Pipeline Delay
8
V
OL
I
SINK
= 500 μA 0.4 V
V
OH
I
SOURCE
= −500 μA OVDD − 0.3 V
POWER SUPPLIES
Specified Performance
AVDD 2.37 2.5 2.63 V
DVDD 2.37 2.5 2.63 V
OVDD 2.30
9
3.6 V
Operating Current
10
2 MSPS throughput
AVDD
11
With internal reference 23 mA
DVDD 2.5 mA
OVDD
12
0.5 mA
Power Dissipation
11
With Internal Reference
10
2 MSPS throughput 75 92 mW
Without Internal Reference
10
2 MSPS throughput 68 85 mW
In Power-Down Mode
12
PD = high 2 μW
TEMPERATURE RANGE
13
Specified Performance T
MIN
to T
MAX
−40 +85 °C
1
When using an external reference. With the internal reference, the input range is −0.1 V to V
REF
.
2
See Analog Inputs section.
3
Linearity is tested using endnotes, not best fit.
4
LSB means least significant bit. With the ±2.048 V input range, 1 LSB is 15.63 μV.
5
See Voltage Reference Input section. These specifications do not include the error contribution from the external reference.
6
All specifications in dB are referred to a full-scale input FS. Tested with an input signal at 0.5 dB below full-scale, unless otherwise specified.
7
Parallel or serial 18-bit.
8
Conversion results are available immediately after completed conversion.
9
See the Absolute Maximum Ratings section.
10
In warp mode. Tested in parallel reading mode.
11
With internal reference, PDREF and PDBUF are low; without internal reference, PDREF and PDBUF are high.
12
With all digital inputs forced to OVDD.
13
Consult sales for extended temperature range.